PLANTS COLLECTED BY WILKES EXPEDITION. 
75 
by Messrs. Pickering and Eld and then returning to Manila. Botanical 
collections were made by both parties. Leaving Manila, January 20, 
the expedition sailed southward, the next place where collecting was 
done being Caldera near Zamboanga, Mindanao, a portion of January 31 
being spent there. From Caldera the ship proceeded to Soung (now 
Jolo) on the Island of Sulu or Jolo, and February 4 and 5 were spent 
there and on Marongas Islet, but because of the unfriendly attitude of 
the natives little collecting could be done except along the beach. Leaving 
Jolo they then proceeded across the Sulu Sea, making no stop until the 
Mangsee (Mangsi) Islands, two small islands. between the larger ones of 
Balabae and Banguey, were reached, where they remained from Feb- 
ruary 8 to 12, the expedition then proceeding through Balabae Strait 
to Singapore. 
In 1836, Asa Cray was tendered and accepted the appointment of 
botanist to the expedition, but in 1838, because of delays in the start, 
and other work claiming his attention, he resigned. In 1848, some 
time after its return, he was appointed to work up the reports of the 
flowering plants and estimated that this report would fill three volumes 
of text. However, only one volume of Cray’s part appeared, although 
we learn from his letters that as late as 1858 he was still working on the 
manuscript of additional portions which never were published. Moreover, 
there are many specimens in the United States National Herbarium 
bearing his manuscript names of species that have not as yet been pub- 
lished, most, if not all of which, so far as Philippine plants are concerned, 
are now antedated in publication by the names of other authors. In 
volume 15 ( Phanerogamia, vol. 1) one hundred and four species of 
Philippine plants are enumerated of which fifteen were described as new ; 
these are considered in the present paper. 
While I was in Washington in July and August, 11107, I had an 
opportunity of examining the Wilkes Expedition specimens in the United 
States National Herbarium, and later, search was made in the Gray 
Herbarium at Cambridge and in the Herbarium of Columbia University, 
now at the New York Botanical Garden, for specimens which could not 
be found at Washington. Still later, in November and December of the 
same year, an opportunity occurred of comparing my critical notes, 
sketches, photographs, etc., with various types in the herbaria of the 
Royal Gardens at Kew and of the British Museum. As a result of the 
examination of the above material it has been considered worth while 
to complete my notes and prepare the accompanying list for publication. 
The most complete set of Wilkes Expedition plants is preserved in the 
United States National Herbarium at Washington, but even it lacks many 
specimens. Partial sets are to be found in the Gray Herbarium at Cam- 
bridge, and in the Herbarium of Columbia University, and there are 
a few sheets at the Royal Gardens, Kew, England. Representatives of 
